/**
 * Copyright (c) 2008, Andrew Carter All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer. Redistributions in binary
 * form must reproduce the above copyright notice, this list of conditions and
 * the following disclaimer in the documentation and/or other materials provided
 * with the distribution. Neither the name of Andrew Carter nor the names of
 * contributors may be used to endorse or promote products derived from this
 * software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
package com.acarter.jmejtree;

import java.awt.Insets;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.dnd.Autoscroll;

import javax.swing.JTree;
import javax.swing.tree.TreeSelectionModel;

import com.acarter.composabletree.ComposableTreeCellRenderer;
import com.acarter.composabletree.ComposableTreeModel;

/**
 * 
 * @author Andrew Carter
 */
public class JMEComposableTree extends JTree implements Autoscroll {

	private static final long serialVersionUID = 1L;

	private int margin = 12;

	/**
	 * @param model
	 */
	public JMEComposableTree(ComposableTreeModel model) {
		super(model);

		setEditable(false);
		setRootVisible(true);
		setShowsRootHandles(true);
		getSelectionModel().setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);
		setCellRenderer(new ComposableTreeCellRenderer());
	}

	/**
	 * 
	 */
	public void autoscroll(Point p) {

		int realrow = getRowForLocation(p.x, p.y);
		Rectangle outer = getBounds();

		realrow = (p.y + outer.y <= margin ? realrow < 1 ? 0 : realrow - 1 : realrow < getRowCount() - 1 ? realrow + 1 : realrow);

		scrollRowToVisible(realrow);
	}

	/**
	 * 
	 */
	public Insets getAutoscrollInsets() {
		
		Rectangle outer = getBounds();
		Rectangle inner = getParent().getBounds();

		return new Insets(inner.y - outer.y + margin, 
				inner.x - outer.x + margin, 
				outer.height - inner.height - inner.y + outer.y + margin,
				outer.width - inner.width - inner.x + outer.x + margin);
	}

}
